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ServerKiller: harden against spurious wakeups

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If awakened by spurious wakeup, the thread would immediately exit without doing anything, rendering it useless.
Not sure how it took so long for this to be found...
This commit is contained in:
Dylan K. Taylor
2023-12-20 17:22:11 +00:00
parent 90af8cfd69
commit 7a55a6e6b6
1 changed files with 9 additions and 6 deletions
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15
src/utils/ServerKiller.php
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@ -24,7 +24,8 @@ declare(strict_types=1);
namespace pocketmine\utils;
use pocketmine\thread\Thread;
use function time;
use function hrtime;
use function intdiv;
class ServerKiller extends Thread{
private bool $stopped = false;
@ -34,13 +35,15 @@ class ServerKiller extends Thread{
){}
protected function onRun() : void{
$start = time();
$this->synchronized(function() : void{
if(!$this->stopped){
$this->wait($this->time * 1000000);
$start = hrtime(true);
$remaining = $this->time * 1_000_000;
$this->synchronized(function() use (&$remaining, $start) : void{
while(!$this->stopped && $remaining > 0){
$this->wait($remaining);
$remaining -= intdiv(hrtime(true) - $start, 1000);
}
});
if(time() - $start >= $this->time){
if($remaining <= 0){
echo "\nTook too long to stop, server was killed forcefully!\n";
@Process::kill(Process::pid());
}